"The Combo Breaker can guess all three numbers on its own within a few minutes, but if you manually find the first number that makes the dial get stuck when you pull on the shackle, then Samy’s device can open the Master combination lock within 30 seconds, using a maximum of only eight attempts. To be more precise, Samy’s technique will give you the exact first and third numbers of the combination, plus eight possible second numbers." - via TechnoBob'sLambert Varias